The send n go feature. On the app on your iPhone, at the bottom of the screen should be three icons...one on the right down there is location. You can search for anything and it uses google maps to find it. Once you pick a destination, the app on you phone gives you the option of send to vehicle or call (if it's a business).
I use that to preload the Nav with my trip plans or as stated to get around the keyboard lockout while driving. For true hands free, I do use Yelp, since you can use the hands free with Yelp to verbally call out a business and then it'll send the location to your navigation system.
Having said all that, I do feel the navigation on the Uconnect system isn't bad, but it's not the greatest. The 2018s are supposed to have Apple CarPlay and I wish my 2017 had that. I helped put in a new head unit on my friend's daughter's FJ. The head unit has CarPlay and that is the bomb. All of the navigation, apps, and hands free stuff to keep your distractions from the road to a minimum while still being able to enjoy the technology.